Hello,

I have several databases running and when I try to query one of them I'm getting the attached exception trace. Any ideas?

Unexpected error: Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 8.6.3
Java: Oracle Corporation, 1.8.0_131
OS: Linux, amd64
Stack Trace: 
java.lang.ArrayIndexOutOfBoundsException: 4291
	at org.basex.io.random.TableDiskAccess.read5(TableDiskAccess.java:172)
	at org.basex.data.Data.textRef(Data.java:446)
	at org.basex.data.DiskData.text(DiskData.java:250)
	at org.basex.query.func.db.DbListDetails$1.get(DbListDetails.java:58)
	at org.basex.query.func.db.DbListDetails$1.get(DbListDetails.java:1)
	at org.basex.query.iter.BasicIter.value(BasicIter.java:63)
	at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.CachedFilter.value(CachedFilter.java:37)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:71)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.List.value(List.java:148)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.If.value(If.java:128)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.List.value(List.java:150)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:71)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.Try.value(Try.java:82)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:185)
	at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:70)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.expr.If.value(If.java:128)
	at org.basex.query.QueryContext.value(QueryContext.java:405)
	at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:182)
	at org.basex.query.func.FuncCall.invoke(FuncCall.java:87)
	at org.basex.query.func.FuncCall.value(FuncCall.java:61)
	at org.basex.query.func.FuncCall.iter(FuncCall.java:66)
	at org.basex.query.QueryContext.iter(QueryContext.java:394)
	at org.basex.query.scope.MainModule.iter(MainModule.java:121)
	at org.basex.query.QueryContext.iter(QueryContext.java:330)
	at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:77)
	at org.basex.http.restxq.RestXqModule.process(RestXqModule.java:104)
	at org.basex.http.restxq.RestXqFunction.process(RestXqFunction.java:107)
	at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:49)
	at org.basex.http.BaseXServlet.service(BaseXServlet.java:59)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:612)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)